期刊
CARBOHYDRATE POLYMERS
卷 236, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.116079
关键词
Silica/cellulose aerogels; Dominant skeleton structure; CO2 uptake; Selectivity
资金
- National Natural Science Foundation of China [21766016]
- Yunnan Ten Thousand Talents Plan Young & Elite Talents Project [YNWR-QNBJ-2018-198]
- Science and Technology Supported Foundation of Guizhou Province [[2018]2334]
- Key Supported Discipline of Guizhou Province [Qian Xuewei He Zi ZDXK[2016]24]
- Applied Basic Research Project of Qujing Normal University [2077360172]
Old corrugated containers-based cellulose and fly ash-based fresh wet silica gel were used as raw materials for in situ synthesis of a series of silica/cellulose aerogels in NaOH/urea solution. At a silicon to cellulose ratio of less than 2.5:1, the skeleton structure of the synthesized composite material was dominated by fibrils decorated with spherical silica nanoparticles. At a silicon to cellulose ratio of higher than 2.5:1, the skeleton structure of the composite material was dominated by spherical silica particles interspersed with cellulose. The synthesized composite material was applied to capture CO2 at ambient temperature and pressure. We observed that with increasing silicon content, the CO2 adsorption capacity of the composite material decreased (regardless of its dominant structure), while its selectivity for CO2/N-2 increased. This work presents a facile method for the synthesis of adsorption material that has high capacity and selectivity for CO2.
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